<p>Hi, I set up a white background with bright light in front to keep the shutter speed at least 1/50 at 2.8 using the 50mm 1.8 lens, the problem is that in some pictures people come out really crisp sharp yet in others they look a bit fuzzy, I don't shake when I snap the photo, but now I feel like I'm not sure where to focus the camera (face, clothes, or flowers in front of person) because the results are inconsistent, maybe something is wrong with the setup? could you help me find out ways to improve so I can create more consistent results?</p>